michael Posted April 22, 2003 Share Posted April 22, 2003 I've only been able to find 1 reference to Houdini's units > 1 unit = 1 meter. is this right?...can it be changed?...will it screw things up if it is changed to, say, centemeters?.... I've imported some obj's from Maya and they are HUGE lol...because Maya's default units are cm.... so I guess my question is: can I change Houdini's units, or, would it be better to scale the objects down in Maya before exporting them? suggestions?...advice? thanks Quote Link to comment Share on other sites More sharing options...
stevenong Posted April 22, 2003 Share Posted April 22, 2003 Hey arctor, You define what 1 unit means in Houdini. You can say it's one meter or 1 mm as long as it suits the scene or what you're looking for. I hope the above helps! Cheers! steven Quote Link to comment Share on other sites More sharing options...
edward Posted April 22, 2003 Share Posted April 22, 2003 I'd still scale your imported geometry by 100 though ... Quote Link to comment Share on other sites More sharing options...
michael Posted April 22, 2003 Author Share Posted April 22, 2003 ah....thanks Steven all I could find was : from the 3D Spatial Audio docs You may also want to change the scale of the whole environment to reflect the sizeof the scene. The default scale is 1 meter per 1 Houdini world unit. To make the environment sound larger than the scene, increase the Meters Per Unit parameter on the SpatialAudio CHOP's Environment page. so Houdini doesn't care eh?...cool...I guess one would just have to keep things consistant Maya doesn't much mind either - unless you're doing Dynamics etc...then it does all it's math assuming 1cm. edward > ???....make it even bigger...??? why? right now the foot of my character geometry is bigger than the construction plane... Quote Link to comment Share on other sites More sharing options...
edward Posted April 22, 2003 Share Posted April 22, 2003 Sorry, I meant scaling it by 100 *smaller*. But then that really depends. Basically you don't want the bounding box of the geometry to be too big nor too small. Quote Link to comment Share on other sites More sharing options...
michael Posted April 22, 2003 Author Share Posted April 22, 2003 ah..heh heh.... whenever I read 'by' I always think multiplication... Quote Link to comment Share on other sites More sharing options...
anakin78z Posted April 22, 2003 Share Posted April 22, 2003 I'd say scale it down. Houdini has rounding errors at large scales, and you don't want to run into those Cheers, Jens Quote Link to comment Share on other sites More sharing options...
michael Posted April 23, 2003 Author Share Posted April 23, 2003 I'll just have to remember to scale down in Maya when I export...hmmm...maybe I'll add that to the script Quote Link to comment Share on other sites More sharing options...
thekenny Posted April 23, 2003 Share Posted April 23, 2003 I'll just have to remember to scale down in Maya when I export...hmmm...maybe I'll add that to the script If you are working in maya in inches, you just have to do the conversion from inches to centimeters. 1/2.54 That is if you don't mind working small. I usually set my construction grid to be: grid spacing 0.08333 x 0.08333 grid count 24x24 grid ruler 12x12 the grid count gives me two feet and the grid ruler gives me the foot breaks. It helps. Only problem I have incountered doing this is some of the tools/SOPs don't "behave" as nicely as they do if the geometry is in a larger scale. Sesi has been trying to accomodatet the smaller scale as much as possible. just a my $.05 CDN -k Quote Link to comment Share on other sites More sharing options...
michael Posted April 23, 2003 Author Share Posted April 23, 2003 inches eh?...bah...I'm a metric kind of guy when it comes to anything 3D related.... I've almost always used Maya's default centemeters and only ever changed to meteres when I was dealing with someone elses files...I can't imagine using inches... Quote Link to comment Share on other sites More sharing options...
thekenny Posted April 23, 2003 Share Posted April 23, 2003 oh, then any model swaping is 1:1. It's only dealing with set measurements, the set guys use inches, when I make things small. -k Quote Link to comment Share on other sites More sharing options...
old school Posted April 28, 2003 Share Posted April 28, 2003 I always use arbitrary units, unless I am pinned down with rope and steaks. The only parts that have "units" are the cameras and lights. The physical camera settings like focal length and aperture are in mm's. If you have a scene modelled in inches, you have to use thekenney's cpnversion factor with a one decimal place shift to scale inches to mm. It should be 1/25.4. This is always a bother with regards to depth of field and rendering. All changed for Houdini6 as the cameras have a DOF handle now! No more stabbing at camera values and figuring stuff out, unless you have to duplicate exact camera values. Then you still have to do some sipherin'. I really like the new camera and light handles, especially the occlusion stuff. Quote Link to comment Share on other sites More sharing options...
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